A5011160548- Coal and Its By-products
- Mercury impact and mitigation studies
- Geochemistry and Elemental Analysis
- Extraction and Separation Processes
- Catalytic Processes in Materials Science
- Toxic Organic Pollutants Impact
- Gas Sensing Nanomaterials and Sensors
- Heavy metals in environment
- Recycling and utilization of industrial and municipal waste in materials production
- Analytical chemistry methods development
- Plasma Applications and Diagnostics
- Radioactive element chemistry and processing
- Air Quality and Health Impacts
- Carbon Dioxide Capture Technologies
- Plasma Diagnostics and Applications
- Industrial Gas Emission Control
- Coal Properties and Utilization
- Recycling and Waste Management Techniques
- nanoparticles nucleation surface interactions
- Mineral Processing and Grinding
- Oil, Gas, and Environmental Issues
- Analytical Chemistry and Sensors
- Environmental Justice and Health Disparities
- Heavy Metal Exposure and Toxicity
- CO2 Sequestration and Geologic Interactions
National Energy Technology Laboratory
2010-2024
United States Department of Energy
2006-2023
Fossil Energy Research (United States)
2023
Morgantown High School
2022
University of Pittsburgh
2008-2014
University of Nottingham
2008
Carnegie Mellon University
2008
Oak Ridge Institute for Science and Education
1998
University of Rochester
1991
A laboratory-scale packed-bed reactor system is used to screen sorbents for their capability remove elemental mercury from various carrier gases. When the gas argon, an on-line atomic fluorescence spectrophotometer (AFS), in a continuous mode, monitors concentration inlet and outlet streams of reactor. The temperature are held constant during test. For more complex gases, capacity determined off-line by analyzing spent sorbent with either cold vapor absorption (CVAAS) or inductively coupled...
Coal and coal combustion byproducts can have significant concentrations of lanthanides (rare earth elements). Rare earths are vital in the production modern electronics optics, among other uses. Enrichment coals may been a function number processes, with contributions from volcanic ash falls being most mechanisms. In this paper, we discuss some important coal-based deposits China US critique classification systems used to evaluate relative value rare distribution elements within byproducts.
Photochemical reactions of mercury with various constituents in flue gas produced by burning coal could be an attractive alternative to dry sorbent- or wet scrubber-based processes for control. The sensitized oxidation elemental using 253.7-nm ultraviolet radiation has been extensively studied. photochemistry simulated gases was examined quartz flow reactors. Mercury-containing at temperatures between 80 and 350 °F were irradiated light. Results are presented the photochemical removal from...
Recent field tests of mercury removal with activated carbon injection (ACI) have revealed that capture is limited in flue gases containing high concentrations sulfur oxides (SOx). In order to gain a more complete understanding the impact SOx on ACI, was tested under varying conditions SO2 and SO3 using packed bed reactor simulated gas (SFG). The final content carbons independent concentration SFG, but presence inhibits even at lowest (20 ppm). capacity decreases as used increases from 1 10%....
In regard to gasification for power generation, the removal of mercury by sorbents at elevated temperatures preserves higher thermal efficiency integrated combined cycle system. Unfortunately, most display poor capacity elemental temperatures. Previous experience with in flue gas has allowed judicious selection potential high-temperature candidate sorbents. The capacities many from nitrogen, as well four different simulated fuel gases 204−371 °C, have been determined. compositions contain...
The use of noble metals as catalysts for mercury oxidation in flue gas remains an area active study. To date, field studies have focused on gold and palladium installed at pilot scale. In this article, we introduce bench-scale experimental results gold, platinum tested realistic simulated gas. Our initial reveal some intriguing characteristics catalytic provide insight future research into potentially important process.
To gain a more complete understanding of the impact sulfur oxides on mercury capture by activated carbon, continuous concentration measurements were made downstream packed sorbent bed. Previous research from this laboratory, which is presented in companion study, indicated that capacity carbon during 6 h exposure to mercury-laden simulated flue gas was inversely proportional S6+ content carbon. The results here indicate high limits both 6-h and initial removal efficiency. observed reduction...
Coal fueled the Industrial Revolution and global expansion of electrification in 20th century. In 21st century, coal use has declined North America Europe but continues to increase Asia. contains many elements Periodic Table, percent levels or trace amounts (parts per million parts billion). The impact these on environment via air emissions water discharges from coal-fired plants been studied, with decades research their chemical transformations within combustion systems fates upon...